em 022 JAGUAR X308 1998 2.G Service Manual

Wi
th EM010 and EM012 disconnected, measure the voltage
between EM010/023 and EM012/022
1
Is th e volt
age 0 (zero) V?
Yes GO to G18
No Inspect harness / connectors EM010, EM012 and EM024 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to G20
G18: CH
ECK HARNESS SHORT TO GROUND

Wi
th EM012 and EM024 disconnected, measure the
resistance between EM012/022 and EM024/001.
1
I s
the resistance < 0.5 OHM?
Yes GO to H10
No Inspect harness / connectors EM012 and EM024 for corrosion,
damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to H11
H 1
0: O2 SENSOR SHORT CIRCUIT TO GROUND

W
ith EM012 and EM024 disconnected, measure the
resistance between EM012/022 and EM024/001.
1
I
s the resistance < 0.5 OHM?
Yes GO to H17
No Inspect harness / connectors EM012 and EM024 for corrosion,
damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to H21
H
17: CHECK FOR SHORT TO B+

W
ith EM010 and EM012 disconnected, measure the voltage
between EM010/023 and EM012/022.
1
Is th
e voltage 0V?
Yes GO to H19
No Inspect harness / connectors EM010, EM012 and EM024 for
corrosion, damaged / pushed back pins.
Repair as required an d reconnect plug(s).
GO to H21
H
19: CHECK HARNESS SHORT TO GROUND

M
easure the insulation resistance between EM012/016 and
EM012/022.
1
I
s the resistance > 10 MOHM?
Yes Reconnect all plugs.
GO to H21
No Inspect harness / connectors EM012, EM015 and EM024 for
corrosion, bent / pushed back pins.
Repair as required an d reconnect plug(s).
GO to H21
H2
1: END
Perform

appropriate service drive cycle and check for the
presence of DTC.
1
Has
the fault code cleared?
Yes STOP
No Contact Jaguar Service

Control Components - Control Components
Diagnosis and Testing
Connector Pin Identity Chart for AC001

Connector Pin Identity Chart for AC002

Pin NumberCircuitCircuit Function
001Compressor ON signal
002Coolant valve
003RH Blower motor relay
004Heated windshield relays (where fitted)
005Heated door mirror relay
006Defrost servomotor (positive)
007Center vent servomotor (positive)
008LH air intake servomotor fre sh / recirculation (positive)
009RH air intake servomotor fresh / recirculation (positive)
010Not used
011Not used
012Foot servomotor (positive)
013Cool air bypass servomotor (positive)
014Not used
015Not used
016LH Blower motor relay
017Coolant pump motor relay
018Heated backlight relay
019Defrost servomotor (negative)
020Center vent servomotor (negative)
021LH air intake servomotor fresh / recirculation (negative)
022RH air intake servomotor fresh / recirculation (negative)
023Not used
024Not used
025Foot servomotor (negative)
026Cool air bypass servomotor (negative)

Connector Pin Identity Chart for FC043

Control Panel Communication
The control panel provides operator interface with the climate control system.
Control panel operation is described in detail in the D section.
Control Panel Inputs (I/P) / Outputs (O/P)
Pin NumberCircuitCircuit Function
001Ignition positive supply
002Battery isolate supply
003Auxiliary ground
004Auxiliary ground to control panel
005Battery supply
006Engine speed input
007Electrical load drive inhibit
008+5V sensors
009Clutch request to ECM
010Diagnostic L-line
011Not used
012Ignition (positive) to control panel
013System ground
014Ground to control panel
015Air conditioning isolation relay
016Vehicle speed
017Pressure switch
018Aspirator motor (In-car sensor)
019Sensor ground
020Logic ground for diagnostic lines
021Diagnostic K-line
022Not used
Pin NumberCircuitCircuit Function
1Input CLOCK
2Input START
3Input DATA IN
4Output DATA OUT
5Input ignition (positive)
6Input auxiliary (negative)
7Ground
8Dimmer
9Dimmer override
10Not used
11Not used
12Not used